Vulnerability in Mullvad Wireguard.sys
CVE-2026-19380
A vulnerability was identified in Mullvad wireguard.sys 0.10.1. The affected element is the function AdapterState of the component IOCTL Handler. Such manipulation leads to improper update of reference count. Local access is required to approach this attack. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (2.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Mullvad Wireguard.sys — versions 0.10.1
Weakness classification (CWE)
References
- vuldb.com/vuln/387273 (technical-description, vdb-entry)
- vuldb.com/vuln/387273/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19380 (third-party-advisory)
- vuldb.com/submit/866726 (third-party-advisory)
- drive.google.com/file/d/1LN68wxIx_2EI4IBVq13UlP4G1aqyz--x/view (exploit)
Frequently asked questions
- What is CVE-2026-19380?
- CVE-2026-19380 is a low-severity vulnerability in Mullvad Wireguard.sys, classified under CWE-664. CVSS score: 2.3/10. Published 2026-08-10.
- How severe is CVE-2026-19380?
- Low severity. CVSS v3 base score is 2.3 out of 10.